<template>
	<view class="uni-list list-pd">
		<view class="uni-list-cell cell-pd">
			<view class="uni-uploader">
				<view class="uni-uploader-head">
					<view class="uni-uploader-title">点击可预览选好的图片</view>
					<view class="uni-uploader-info">{{imageList.length}}/9</view>
				</view>
				<view class="uni-uploader-body">
					<view class="uni-uploader__files">
						<block v-for="(image,index) in imageList" :key="index">
							<view class="uni-uploader__file">
								<view class="icon iconfont icon-shanchu" @tap="deleteTap(index)"></view>
								<image class="uni-uploader__img" :src="image" :data-src="image" @tap="previewImage"></image>
							</view>
						</block>
						<view class="uni-uploader__input-box">
							<view class="uni-uploader__input" @tap="chooseImage"></view>
						</view>
					</view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	const sourceType = [
		['camera'],
		['album'],
		['camera', 'album']
	]
	const sizeType = [
		['compressed'],
		['original'],
		['compressed', 'original']
	]
	export default {
		data() {
			return {
				imageList: [],
				sourceTypeIndex: 2,
				sourceType: ['拍照', '相册', '拍照或相册'],
				sizeTypeIndex: 2,
				sizeType: ['压缩', '原图', '压缩或原图'],
				countIndex: 8,
				count: [1, 2, 3, 4, 5, 6, 7, 8, 9]
			}
		},
		methods: {
			// 上传图片
			chooseImage: async function() {
				if (this.imageList.length === 9) {
					return
				}
				uni.chooseImage({
					sourceType: sourceType[this.sourceTypeIndex],
					sizeType: sizeType[this.sizeTypeIndex],
					count: this.imageList.length + this.count[this.countIndex] > 9 ? 9 - this.imageList.length : this.count[this.countIndex],
					success: (res) => {
						this.imageList = this.imageList.concat(res.tempFilePaths);
						this.$emit('upload', this.imageList)
					}
				})
			},
			// 预览图片
			previewImage: function(e) {
				var current = e.target.dataset.src
				uni.previewImage({
					current: current,
					urls: this.imageList
				})
			},
			// 删除图片
			deleteTap(index) {
				uni.showModal({
					title: '提示',
					content: '是否删除该图片',
					success: (res) => {
						if (res.confirm) {
							console.log('用户点击确定');
							this.imageList.splice(index, 1)	
							this.$emit('upload', this.imageList)
						}
					}
				});
			}
		}
	}
</script>

<style lang="scss" scoped>
	.uni-list{
		&:before,
		&::after {
			background-color: #FFFFFF;
		}
		/* .uni-list-cell{
			padding: 20upx;
		} */
		.cell-pd {
			padding: 22rpx 30rpx;
		}
		
		.list-pd {
			margin-top: 50rpx;
		}
		.uni-uploader__file{
			position: relative;
			.icon-shanchu{
				position: absolute;
				top: 0;
				right: 0;
				color: #FFFFFF;
				background-color: rgba($color: #000000, $alpha: .3);
				border-radius: 5upx;
				padding: 0 5upx;
				z-index: 999;
			}
		}
	}
</style>
